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A New History For The Tropical Forests Of The Americas

Fossilized leaves and pollen are revealing the evolutionary past of New World tropical forests. The findings are helping to reshape predictions of what might happen to these ecosystems as the climate changes.

The great extinction 66 million years ago, caused by the impact of a meteorite in the Yucatan Peninsula, was the starting point for the emergence of Neotropical forests as we know them today.CREDIT: PHOTO BY DAVID RIAÑO CORTÉS

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In northern Colombia, in a semi-desert region that juts into the Caribbean Sea, its dusty roads traveled by the Wayúu people with their blankets and colorful backpacks, is Cerrejón — one of the largest open-pit coal mines in the world. Excavated for more than 30 years, its huge craters and twisted paths down which the trucks descend give the impression of a tropical hell.

But for the trained eyes of Carlos Jaramillo, that hell is a paradise he always dreamed of finding. There, while working for the Colombian Petroleum Institute more than 20 years ago, Jaramillo, a paleontologist and pollen expert, began with other colleagues to unearth the lost history of the Neotropical forests of the Americas — and to challenge some of the paradigms of paleontology.

Fossil after fossil, these scientists have been reconstructing a history that was thought to be impossible to discover. “For many years, it was ...

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